186974213 has 2 divisors, whose sum is σ = 186974214. Its totient is φ = 186974212.

The previous prime is 186974201. The next prime is 186974219. The reversal of 186974213 is 312479681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141181924 + 45792289 = 11882^2 + 6767^2 .

It is a cyclic number.

It is not a de Polignac number, because 186974213 - 2⁴ = 186974197 is a prime.

It is a Chen prime.

It is equal to p_10396679 and since 186974213 and 10396679 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (186974219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93487106 + 93487107.

It is an arithmetic number, because the mean of its divisors is an integer number (93487107).

Almost surely, 2^186974213 is an apocalyptic number.

It is an amenable number.

186974213 is a deficient number, since it is larger than the sum of its proper divisors (1).

186974213 is an equidigital number, since it uses as much as digits as its factorization.

186974213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 186974213 is about 13673.8514325701. The cubic root of 186974213 is about 571.8216196425.

The spelling of 186974213 in words is "one hundred eighty-six million, nine hundred seventy-four thousand, two hundred thirteen".